(Closed) Make your own wedding band

I’ll start out by saying I don’t even know if this is possible, but I’m hoping someone out there might be able to help me. Way back when, my mom gave me a promise ring. Well, it just so happens that it fits on my fiance’s ring finger perfectly. What I really want to do is create a ring for him that essentially wraps/melts/forms around my promise ring. So, when you look in the inside of his ring, you can see the gold band from my promise ring in the middle of his ring. Essentially, I want his wedding band to be made out of my promise ring, plus other metal so that i looks like a normal wedding band from the outside.